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Mitsubishi Electric FR-V560 Instruction Manual Page 105

Vector inverter.
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Standard operation functions (Pr. 10 to Pr. 16)
The control block diagram during pre-excitation
0r/min speed command
0rad position command
Timing chart
Speed
LX pre-excitation
STF
Pre-excitation operation
0 speed control or servo lock
DC injection brake time (Pr.11)
is made invalid.
* When the LX (pre-excitation) terminal is off, the pre-excitation operation functions for the time set in the DC
injection brake operation time (Pr. 11).
CAUTION
The DC injection brake functions during speed restriction under speed control or torque control. (It does
not function under position control.)
2) Vector control without encoder
For brake operation during deceleration to a stop at the speed less than Pr.10 "DC injection brake operation
speed", select either zero speed control for vector control with encoder or DC brake operation for magnetic flux
vector control.
CAUTION
This setting is made invalid when the start signal is turned on with the set speed less than Pr. 13
"starting speed" and brake operation under 0 speed control is performed.
Parameter
Name
Brake operation selection
850
for vector control without
encoder
Relationship between DC injection brake operation and pre-excitation operation in each
control mode
Control Mode
V/F control
Speed control (vector control
with encoder)
Speed control (vector control
without encoder)
Position control (vector control
with encoder)
Pr.802 = 0
Position control
Pr.802 = 1
Normal operation
0: DC injection brake with current control (factory setting)
When the speed has reached the DC injection brake operation speed (Pr. 10),
brake operation is performed by applying the voltage set in Pr. 12 "DC injection
brake voltage" against input voltage for the period set in Pr. 11 "DC injection
brake voltage".
1: 0 speed control
Same control as for vector control with encoder. (servo lock is not enabled)
LX terminal OFF
(Deceleration to stop)
Pre-excitation
selection
Pr. 802 = 0
DC injection brake
0 speed control
0 speed control
No operation
Speed control
DC injection brake operation
speed (Pr. 10)
Pre-excitation operation
0 speed control or servo lock
DC injection brake time (Pr.11)
is made invalid.
Description
Operation
Pre-excitation
Pre-excitation
selection
Pr. 802 = 1
DC injection brake
No operation
Servo lock
0 speed control
0 speed control
0 speed control
No operation
Servo lock
96
Motor
LX terminal ON
Pre-excitation
selection
selection
Pr. 802 = 0
Pr. 802 = 1
No operation
Servo lock
0 speed control
Servo lock

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